Virtual reality

3.
History of VR
• 1950’s visionary
cinematographer
Morton H Eilig built a
single user console
called Sensorama . This
enabled the user watch
television in three
dimensional ways.

4.
• In 1961, Philco Corporation engineers developed the
first HMD known as the Headsight.
• It was in 1965 IVAN SUTHERLAND envisioned what
he called the “Ultimate Display.”
• In 1988, commercial development of VR began.
• In 1991, first commercial entertainment VR
system "Virtuality" was released.

5.
Introduction
• What is Virtual Reality(VR)?
Virtual Reality refers to a high-end user interface that
involves real-time simulation and interactions through
multiple sensorial channels
in other words,
Virtual reality is a computer generated world
with which the user can interact.

6.
Introduction (Cont’d)
• Why VR?
VR is able to immerse you in a computer-generated
world of your own making: a room, a city, the interior of
human body. With VR, you can explore any uncharted
territory of the human imagination.

8.
Types of VR system
• Windows on World(WoW)
– Also called Desktop VR.
– Using a conventional computer monitor to display the
3D virtual world.

9.
Types of VR system(cont’d)
• Immersive VR
– Completely immerse the user's personal viewpoint
inside the virtual 3D world.
– The user has no visual contact with the physical
word.
– Often equipped with a Head Mounted Display (HMD)

10.
Types of VR system(cont’d)
• Telepresence
– A variation of visualizing complete computer
generated worlds.
– Links remote sensors in the real world with the
senses of a human operator. The remote sensors
might be located on a robot. Useful for performing
operations in dangeroust environments.

11.
Types of VR system(cont’d)
• Mixed Reality(Augmented Reality)
– The seamless merging of real space and virtual
space.
– Integrate the computer-generated virtual objects into
the physical world which become in a sense an equal
part of our natural environment.

12.
Types of VR system(cont’d)
• Video Mapping VR
− The user watches a monitor that
shows his body's interaction
with the world.
− The element of interaction
depends on a number of factors
like speed, range and mapping.

13.
Types of VR system(cont’d)
• Distributed VR
– A simulated world runs on several computers which
are connected over network and the people are able
to interact in real time, sharing the same virtual world.

17.
Technologies of VR--Hardware (Cont’d)
• Cave Automatic Virtual Environment
(CAVE)
 Provides the illusion of immersion by projecting
stereo images on the walls and floor of a room-
sized cube.
 A head tracking system continuously adjust the
stereo projection to the current position of the
leading viewer.

22.
Components of VR System (Cont’d)
• Input Processor
– Control the devices used to input information to the
computer. The object is to get the co-ordinate data to
the rest of the system with minimum time.
– Keyboard, mouse, 3D position trackers, a voice
recognition system, etc.

23.
Components of VR System (Cont’d)
• Simulation Processor
– Core of a VR system.
– Takes the user inputs along with any tasks
programmed into the world and determine the
actions that will take place in the virtual world.

24.
Components of VR System (Cont’d)
• Rendering Processor
– Create the sensations that are output to the user.
– Separate rendering processes are used for visual,
auditory, haptic and other sensory systems. Each
renderer take a description of the world stat from
the simulation process or derive it directly from the
World Database for each time step.

25.
Components of VR System (Cont’d)
• World Database (World Description
Files)
– Store the objects that inhabit the world, scripts that
describe actions of those objects.